WOBURN — A Middlesex Superior Court judge ordered Jared Remy Wednesday to submit to a saliva test and sealed from the public an interview that investigators conducted with Remy’s daughter a day after the little girl’s mother was slain, allegedly by Remy.

Waltham officers discovered the child as they secured the scene Aug. 15, after arriving at the couple’s townhouse to find a shirtless, blood-soaked Jared Remy standing outside his home near the body of Jennifer Martel, police wrote at the time, noting that the 4-year-old appeared physically unharmed but was taken as a precaution to Newton-Wellesley Hospital.

But the hearing Wednesday was the first indication that Arianna Remy, who turned 5 three weeks after her mother was killed, was interviewed by authorities the next day. Prosecutors disclosed that they provided a video recording of that interview last month to Jared Remy’s defense team. Judge Kathe M. Tuttman ordered a restriction on the recording and a related transcript to limit them from wider release.

Jared Remy, the 35-year-old son of celebrated Red Sox broadcaster Jerry Remy, faces a murder count and five other charges in an alleged beating of Martel last Aug. 13 and in her death two nights later. His trial is scheduled for October.

Remy’s defense lawyer, Edward P. Ryan Jr., agreed Wednesday to the motion to restrict the interview recording, as well as to allow authorities to collect a saliva sample from Remy for DNA purposes.

Remy, who was not present at the brief hearing, is being held at the Cambridge jail. Ryan and Assistant District Attorney Lisa S. McGovern said in court that the saliva would probably be collected at the jail with State Police and a member of the defense team present, to be scheduled as early as next week.

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Arianna Remy is the daughter of Jennifer Martel and Jared Remy.

Once the sample is collected, it could take six or seven months for the state crime lab to process it, McGovern said. She also told Tuttman that she was waiting for the state medical examiner to complete its autopsy report on Martel, an aspiring teacher who was killed at 27, but was hopeful it could be done by month’s end.

Tuttman scheduled the next hearing for April 30, asking prosecutors to provide all
evidence it may use at trial to the defense
by then and to update her on the status of the DNA testing.

Prosecutors declined to comment afterward, and Ryan said it is too early to say whether he will file a motion to dismiss the case.

He said the restriction on the recorded interview means “it’s simply not to be disclosed beyond the confines of what is necessary for the defendant to prepare for trial,” and he cautioned against calling the recording a witness interview. “It’s a video of an interview with a child,” he said. “I wouldn’t call her a witness necessarily.”